(19)
(11) EP 2 053 723 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.04.2010 Bulletin 2010/15

(43) Date of publication A2:
29.04.2009 Bulletin 2009/18

(21) Application number: 08253385.2

(22) Date of filing: 17.10.2008
(51) International Patent Classification (IPC): 
H02K 5/167(2006.01)
H02K 5/14(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 22.10.2007 GB 0720599

(71) Applicant: Johnson Electric S.A.
2300 La Chaux-de-Fonds (CH)

(72) Inventor:
  • Rogelein, Dieter c/o Johnson Elect. Engin. Ltd
    Tai Po, N.T., Hong Kong (HK)

(74) Representative: Hackett, Sean James 
Marks & Clerk LLP 27 Imperial Square
Cheltenham Gloucestershire GL50 1RQ
Cheltenham Gloucestershire GL50 1RQ (GB)

   


(54) Electric motor


(57) An electric motor 10 has a wound rotor 14 having a shaft 16, a rotor core 15, a commutator 19 and windings wound about the rotor core 15 and connected to the commutator 19. It has a stator 12 confronting the rotor 14; brush gear 20 electrically connecting the commutator 19 to motor terminals 23; first and second bearings 18, 28 for rotatably supporting the rotor 14, and an oil collector 35 fitted to the shaft 16 between the commutator 19 and the first bearing 18 for preventing oil migrating along the shaft 16 from the first bearing 18 reaching the commutator 19. The oil collector 35 is of high temperature material, preferably a metal such as brass, aluminum and steel. In a preferred embodiment, the oil collector 35 returns collected oil to the first bearing 18.







Search report